CN110274274B - Control method and system of intelligent range hood - Google Patents
Control method and system of intelligent range hood Download PDFInfo
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- CN110274274B CN110274274B CN201810206348.4A CN201810206348A CN110274274B CN 110274274 B CN110274274 B CN 110274274B CN 201810206348 A CN201810206348 A CN 201810206348A CN 110274274 B CN110274274 B CN 110274274B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 195
- 239000007789 gas Substances 0.000 claims abstract description 121
- 239000003921 oil Substances 0.000 claims abstract description 95
- 239000000779 smoke Substances 0.000 claims abstract description 93
- 239000002737 fuel gas Substances 0.000 claims abstract description 32
- 239000000295 fuel oil Substances 0.000 claims abstract description 7
- 239000006233 lamp black Substances 0.000 claims description 18
- 238000013178 mathematical model Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000010411 cooking Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 description 13
- 239000006096 absorbing agent Substances 0.000 description 8
- 239000004071 soot Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a control method and a system of an intelligent range hood, wherein the control method comprises the following steps: s1, respectively carrying out data acquisition on external fuel gas and oil smoke according to preset sampling parameters to generate a fuel gas sampling sequence and an oil smoke sampling sequence S2, respectively carrying out shift clearing on the fuel gas sampling sequence and the oil smoke sampling sequence of one sampling period by the intelligent range hood to generate a fuel gas reducing sampling sequence and an oil smoke reducing sampling sequence, generating a fuel gas average value according to the fuel gas reducing sampling sequence, and generating an oil smoke average value according to the oil smoke reducing sampling sequence; s3, the intelligent range hood performs comparison analysis on the gas average value and the oil smoke average value of different periods in the S2 according to a preset gas comparison value and oil smoke comparison value; generating a control signal and an alarm signal respectively; s4, controlling the operation of the fan by the intelligent range hood according to the control signal in the step S3; and the intelligent range hood respectively controls the opening and closing of the gas valve and the alarm according to the alarm signal in the step S3.
Description
Technical Field
The invention belongs to the technical field of intelligent range hoods, and particularly relates to a control method and a system of an intelligent range hood.
Background
In an intelligent automatic control system of a range hood, data of sensors are often required to be collected according to a time sequence to form a sequence. And averaging the sequences to obtain real-time state information of the sensor on the environment. For example, to monitor the concentration of soot in real time, a data sequence may be periodically acquired from a soot sensor and the sequence averaged to evaluate the range of soot concentration over the period.
At present, a method for calculating a sequence average value mainly comprises the steps of taking a fixed integer number of core clocks as a sampling period T to collect data, wherein a group of data collected in each sampling period is taken as a sequence, stored in a register, and algebraically averaged all data of the sequence collected in one sampling period. For example, the sampling period T, the sampling number i, the sampling value N (i), the accumulated value S, the average value a, the accumulated value can be obtained: s=n (1) + … +n (i); according to the accumulated value and the sampling number, obtaining the average value of the sequence: a=s/i;
in the existing method for calculating the average value of the sensor sequence, the lampblack system adopts the information sensed by the sensor in a time period, and the sensor instantaneously senses gas with uneven distribution along with the change of indoor environment in a local space of a kitchen, or the sampling value N (i) obtained at a specific moment is finally excessively large or excessively small due to the limitation of the dynamic characteristics and stability of electronic components, so that the actual kitchen gas concentration distribution range in the sampling period is deviated, and the average value A is greatly influenced by deviation. If the fan is a lampblack sensor, the effect of early response or delayed response of the fan is caused, even if the lampblack concentration is small, the lampblack sensor should respond to the low-speed gear of the fan, but actually responds to the condition of medium speed or high-speed gear of the fan; in the case of a gas sensor, this can have the consequence of false alarms or delayed alarms.
Disclosure of Invention
The invention aims to solve the technical problems that the range hood has low detection induction capability on oil smoke and gas and the range hood has unsatisfactory fan control capability, and provides a control method and a system for the intelligent range hood, which are used for optimizing detected oil smoke and gas signals, further improving the precision and accuracy of the range hood in detecting external gas and improving the intelligent control capability of the range hood on the fan.
In order to solve the problems, the invention is realized according to the following technical scheme:
the invention discloses a control method of an intelligent range hood, which comprises the following steps:
s1, respectively carrying out data acquisition on external fuel gas and oil smoke by the intelligent range hood according to preset sampling parameters to generate a fuel gas sampling sequence and an oil smoke sampling sequence, wherein the sampling parameters comprise sampling periods and sampling numbers;
s2, the intelligent range hood shifts and clears the gas sampling sequence and the oil smoke sampling sequence of one sampling period respectively to generate a gas-reducing sampling sequence and an oil smoke-reducing sampling sequence, generates a gas average value according to the gas-reducing sampling sequence, and generates an oil smoke average value according to the oil smoke-reducing sampling sequence;
s3, the intelligent range hood performs comparison analysis on the gas average value and the oil smoke average value of different periods in the S2 according to a preset gas comparison value and oil smoke comparison value; the intelligent range hood combines the comparison result of the average gas value and the average oil smoke value to generate a real-time control signal of the fan; meanwhile, generating a real-time alarm signal according to a comparison result of the average value of the fuel gas;
s4, controlling the operation of the fan by the intelligent range hood according to the control signal in the step S3; and the intelligent range hood respectively controls the opening and closing of the gas valve and the alarm according to the alarm signal in the step S3.
Further, the step of generating the average value of the fuel gas/oil smoke by the S2 comprises the following specific steps:
s211, the intelligent range hood obtains a convergence center value A1 of a gas sampling sequence in a sampling period T according to the following mathematical model;
wherein: i+k is the number of samples (i and k are positive integers, i > k), and N (i+k) is the sample sequence value;
s212, the intelligent range hood obtains a deviation average mean square value D (N (i+k)) of each sampling element of the gas sampling sequence in the sampling period T according to the following mathematical model;
D(N(i+k))＝(N(i+k)-A) 2 ；
wherein: a is the average value of the sampling sequence;
s213, shift clearing: among all sampling elements of the gas sampling sequence in the sampling period T, finding out k sampling elements corresponding to a deviation average mean square difference value D (N (i+k)) which deviates from the convergence central value A1 to the maximum, wherein the k sampling elements are called deviation sampling elements, and the k deviation sampling elements are removed by shifting; reserving the remaining i sampling elements to form a new sequence to replace the original gas sampling sequence, so as to form a gas-reducing sampling sequence;
s214, the intelligent range hood obtains the average value of the gas-reducing sampling sequence in the S223 according to the following mathematical model, and generates a final gas average value A2 of the sampling period T;
wherein N (i) is a downsampled sequence value;
and the intelligent range hood obtains the average value of the oil smoke in the sampling period T according to the same operation of the S211-S214.
Further, the specific steps of shifting and clearing the fuel gas sampling sequence and the oil smoke sampling sequence in the nT period are as follows:
s221, acquiring a fuel gas sampling sequence and an oil smoke sampling sequence of an nT period;
s222, removing deviated sampling elements from a fuel gas sampling sequence and an oil smoke sampling sequence in an nT period according to the operations of S211-S213; updating the gas sampling sequence from which the deviated sampling elements are removed into a gas reducing sampling sequence of an nT period; and updating the lampblack sampling sequence after the offset sampling elements are removed into a reduced lampblack sampling sequence in the nT period.
A system of intelligent range hood, comprising:
a gas sensor for detecting the concentration of gas in the outside air, generating a gas signal;
the non-dispersive infrared detector is used for detecting the oil smoke concentration in the outside air and generating an oil smoke signal;
the single chip microcomputer is respectively connected with the gas sensor and the non-dispersive infrared detector, receives a gas signal and an oil smoke signal, generates a control signal according to the gas signal and the oil smoke signal, generates an alarm signal according to the gas signal and closes a gas valve;
the fan controller is connected with the singlechip, receives a control signal of the singlechip, converts an analog/digital signal and outputs the analog/digital signal to the fan, so that the intelligent range hood can realize speed regulation control and start and stop of the fan;
the alarm is connected with the singlechip, receives an alarm signal of the singlechip and sends out alarm sound according to the alarm signal;
the wireless communicator is used for communication connection between the intelligent range hood and the user mobile terminal; the wireless communication module is connected with the singlechip, and the wireless communication device receives an alarm signal of the singlechip and converts the alarm signal into alarm information to be sent to the mobile terminal of the user; meanwhile, control information of the mobile terminal of the user is received and sent to the singlechip. Through this design, intelligent lampblack absorber realizes the real-time supervision to gas concentration, and above monitoring state or alarm signal etc. are through wireless propelling movement to user's mobile terminal, and the user can be through the operation of mobile terminal control intelligent lampblack absorber and the warning after the dangerous end that takes place remove the function, realizes intelligent lampblack absorber's man-machine multifunctionality.
Further, the intelligent range hood further comprises:
the light sensor is connected with the singlechip, senses the current external light brightness condition, generates a light signal and outputs the light signal to the singlechip, and the singlechip processes the light signal to generate a lamp control signal;
the lamp controller is connected with the singlechip, and the lamp controller receives a lamp control signal to realize that the intelligent range hood controls the opening and closing of the illuminating lamp and the brightness.
Further, the intelligent range hood further comprises a microwave human body sensor which is connected with the singlechip, and the microwave human body sensor is used for detecting a human body target. Through this design, this intelligent lampblack absorber is through microwave human inductor, and light sensor and lamp accuse ware's combination use can realize intelligent lampblack absorber and carry out the intelligent control of lampblack absorber illumination light through the judgement to external light intensity when sensing the human body, simultaneously to the monitoring of external culinary art state and on duty state.
Further, the intelligent range hood is also provided with a gas electromagnetic valve which is connected with the singlechip, and when the detected average value of the gas is larger than the comparison value, the singlechip controls the closing of the gas electromagnetic valve, so that the safety of a user is ensured.
Further, the alarm is an audible and visual alarm, and when the intelligent range hood detects an unattended abnormal state or a cooking state danger, the alarm sounds and lights up warning light to remind a user of timely carrying out emergency treatment.
Compared with the prior art, the invention has the beneficial effects that:
1. in the control method of the intelligent range hood, the gas sampling sequence and the oil smoke sampling sequence are respectively shifted and cleared to generate the gas-reducing sampling sequence and the oil smoke-reducing sampling sequence, so that the final gas average value and the oil smoke average value are calculated, and the accuracy and the precision of the sampling sequence average value are improved; the optimization and simplification processing of the collected data enables the whole intelligent range hood to be more accurate and reasonable in the sensing environment of the sensor in one sampling period. The sensitivity of the whole range hood system is improved; at the same time, the delay response time due to the sensor hysteresis characteristic is shortened. The accurate response of series intelligent control such as accurate and efficient control of the fan, early warning of fuel gas and the like is ensured.
2. The intelligent range hood system is based on the combination of the optimization processing of a gas sensor, a non-dispersive infrared detector and a singlechip on data and the fan control technology. By using the detection of oil smoke and gas as two independent detection elements. The gas sensor is based on detection of fuel gas and auxiliary detection of oil smoke to realize intelligent motor control technology; the non-dispersive infrared detector is used as a main detection means for oil smoke, and the acquired gas signals and oil smoke signals are optimized, so that the oil smoke and the gas are accurately distinguished, and the intelligent control of the fan is realized. The detection precision and accuracy of the intelligent range hood are improved, and the control capability of the operation of the fan is improved.
3. The fan controller and the alarm are used for receiving the signal of the singlechip, so that the resources of the singlechip are occupied; the fan controller can convert continuous control signals output by the singlechip into analog signals and digital signals, the analog signals can be compatible with motors for adjusting the rotating speed of the analog gears, the digital signals can be compatible with motors for adjusting the rotating speed of the digital gears, the universality is strong, and the cost of the singlechip is greatly reduced.
4. The intelligent range hood is in communication connection with the mobile terminal of the user through the wireless communicator; the wireless communicator receives the alarm signal of the singlechip, converts the alarm signal into alarm information, sends the alarm information to the mobile terminal of the user, and sends the alarm information to the user; meanwhile, the control information of the mobile terminal of the user can be received and sent to the singlechip. The user can remote monitoring kitchen state in the house, and the user can also control the operation of intelligent lampblack absorber through mobile terminal, realizes intelligent and the man-machine multifunctionality of intelligent lampblack absorber.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a system composition diagram of an intelligent range hood of the present invention;
in the figure: 1-gas sensor, 2-non-dispersive infrared detector, 3-singlechip, 4-fan controller, 5-alarm, 6-wireless communicator, 7-light sensor, 8-light controller, 9-microwave human body sensor.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The invention discloses a control method of an intelligent range hood, which comprises the following steps:
a control method of an intelligent range hood comprises the following steps:
s1, respectively carrying out data acquisition on external fuel gas and oil smoke by the intelligent range hood according to preset sampling parameters to generate a fuel gas sampling sequence and an oil smoke sampling sequence, wherein the sampling parameters comprise sampling periods and sampling numbers;
s2, the intelligent range hood shifts and clears the gas sampling sequence and the oil smoke sampling sequence of one sampling period respectively to generate a gas-reducing sampling sequence and an oil smoke-reducing sampling sequence, generates a gas average value according to the gas-reducing sampling sequence, and generates an oil smoke average value according to the oil smoke-reducing sampling sequence;
s3, the intelligent range hood performs comparison analysis on the gas average value and the oil smoke average value of different periods in the S2 according to a preset gas comparison value and oil smoke comparison value; the intelligent range hood combines the comparison result of the average gas value and the average oil smoke value to generate a real-time control signal of the fan; meanwhile, generating a real-time alarm signal according to a comparison result of the average value of the fuel gas;
s4, controlling the operation of the fan by the intelligent range hood according to the control signal in the step S3; and the intelligent range hood respectively controls the opening and closing of the gas valve and the alarm according to the alarm signal in the step S3. Specifically, the step S2 of generating the average gas/oil smoke value includes the following specific steps:
s211, the intelligent range hood obtains a convergence center value A1 of a gas sampling sequence in a sampling period T according to the following mathematical model;
wherein: i+k is the number of samples (i and k are positive integers, i > k), and N (i+k) is the sample sequence value;
s212, the intelligent range hood obtains a deviation average mean square value D (N (i+k)) of each sampling element of the gas sampling sequence in the sampling period T according to the following mathematical model;
D(N(i+k))＝(N(i+k)-A) 2 ；
wherein: a is the average value of the sampling sequence;
s213, shift clearing: among all sampling elements of the gas sampling sequence in the sampling period T, finding out k sampling elements corresponding to a deviation average mean square difference value D (N (i+k)) which deviates from the convergence central value A1 to the maximum, wherein the k sampling elements are called deviation sampling elements, and the k deviation sampling elements are removed by shifting; reserving the remaining i sampling elements to form a new sequence to replace the original gas sampling sequence, so as to form a gas-reducing sampling sequence;
s214, the intelligent range hood obtains the average value of the gas-reducing sampling sequence in the S223 according to the following mathematical model, and generates a final gas average value A2 of the sampling period T;
wherein N (i) is a downsampled sequence value;
and the intelligent range hood obtains the average value of the oil smoke in the sampling period T according to the same operation of the S211-S214.
The specific steps of shifting and clearing the fuel gas/oil smoke sampling sequence in the nT period are as follows:
s221, acquiring a fuel gas sampling sequence and an oil smoke sampling sequence of an nT period;
s222, removing deviated sampling elements from a fuel gas sampling sequence and an oil smoke sampling sequence in an nT period according to the operations of S211-S213; updating the gas sampling sequence from which the deviated sampling elements are removed into a gas reducing sampling sequence of an nT period; and updating the lampblack sampling sequence after the offset sampling elements are removed into a reduced lampblack sampling sequence in the nT period.
As shown in fig. 1, a system of an intelligent range hood includes:
a gas sensor 1 for detecting a gas concentration in the outside air to generate a gas signal;
a non-dispersive infrared detector 2 for detecting a soot concentration in the outside air, generating a soot signal;
the singlechip 3 is respectively connected with the gas sensor 1 and the non-dispersive infrared detector 2, and is used for receiving a gas signal and an oil smoke signal, the singlechip 3 generates a control signal according to the gas signal and the oil smoke signal, and the singlechip 3 generates an alarm signal according to the gas signal and closes a gas valve;
the fan controller 4 is connected with the singlechip 3, and the fan controller 4 receives a control signal of the singlechip 3 and converts an analog/digital signal to output to the fan so as to realize speed regulation control and start and stop of the intelligent range hood on the fan;
the alarm 5 is connected with the singlechip 3, and the alarm 5 receives an alarm signal of the singlechip 3 and sends out an alarm sound according to the alarm signal;
the wireless communicator 6 is used for communication connection between the intelligent range hood and the mobile terminal of the user; the wireless communication module is connected with the singlechip 3, and the wireless communicator 6 receives an alarm signal of the singlechip 3 and converts the alarm signal into alarm information to be sent to the mobile terminal of the user; meanwhile, control information of the user mobile terminal is received and sent to the singlechip 3.
The intelligent range hood further comprises: a light sensor and light controller 8; the light sensor is connected with the singlechip 3, senses the current external light brightness condition, generates a light signal and outputs the light signal to the singlechip 3, and the singlechip 3 processes the light signal to generate a lamp control signal; the lamp controller 8 is connected with the singlechip 3, and the lamp controller 8 receives a lamp control signal to realize that the intelligent range hood controls the opening and closing of the illuminating lamp and the brightness.
The intelligent range hood further comprises a microwave human body sensor 9 which is connected with the singlechip 3, and the microwave human body sensor 9 is used for detecting a human body target. The microwave human body sensor 9 is combined with the light sensor to control the on-off of the illuminating lamp.
Further, the intelligent range hood is also provided with a gas electromagnetic valve which is connected with the singlechip, and when the detected average value of the gas is larger than the comparison value, the singlechip controls the closing of the gas electromagnetic valve, so that the safety of a user is ensured.
Further, the alarm is an audible and visual alarm, and when the intelligent range hood detects an unattended abnormal state or a cooking state danger, the alarm sounds and lights up warning light to remind a user of timely carrying out emergency treatment.
The invention relates to a control method of an intelligent range hood and a working principle of a system thereof, which are as follows:
the intelligent range hood detects and collects external gas signals through the gas sensor, detects and collects external oil smoke signals through the non-dispersive infrared detector, and the singlechip optimizes the gas signals and the oil smoke signals respectively to generate a gas average value and an oil smoke average value;
comparing the average gas value with a preset first gas comparison value and a preset second gas comparison value, and when the average gas value is equal to or larger than the first gas comparison value, sending control signals of starting and high gear to a fan controller by the singlechip to further control the fan; when the gas comparison value is equal to or greater than the second gas comparison value, the singlechip sends an alarm signal to the alarm module, so as to control the closing of the alarm and the gas valve.
Comparing the average oil smoke value with a preset oil smoke comparison value I, an oil smoke comparison value II and an oil smoke comparison value III; when the oil smoke comparison value is equal to or greater than the oil smoke comparison value, the singlechip sends control signals of starting and low gear to the fan controller; when the oil smoke contrast value is equal to or greater than the oil smoke contrast value II, the singlechip sends control signals of starting and middle gears to the fan controller; and when the oil smoke comparison value is equal to or greater than the oil smoke comparison value III, the singlechip sends control signals of starting and high gear to the fan controller.
In the control method of the intelligent range hood, disclosed by the invention, the gas/oil smoke sampling sequences are respectively shifted and cleared to generate the gas/oil smoke reducing sampling sequences, so that the final gas/oil smoke average value is calculated, and the accuracy and the precision of the sampling sequence average value are improved; the optimization and simplification processing of the collected data enables the whole intelligent range hood to be more accurate and reasonable in the sensing environment of the sensor in one sampling period. The sensitivity of the whole range hood system is improved; at the same time, the delay response time due to the sensor hysteresis characteristic is shortened. The accurate response of series intelligent control such as accurate and efficient control of the fan, early warning of fuel gas and the like is ensured.
The intelligent range hood system is based on the combination of the optimization processing of a gas sensor, a non-dispersive infrared detector and a singlechip on data and the fan control technology. By using the detection of oil smoke and gas as two independent detection elements. The gas sensor is based on detection of fuel gas and auxiliary detection of oil smoke to realize intelligent motor control technology; the non-dispersive infrared detector is used as a main detection means for oil smoke, and the acquired gas signals and oil smoke signals are optimized, so that the oil smoke and the gas are accurately distinguished, and the intelligent control of the fan is realized. The detection precision and accuracy of the intelligent range hood are improved, and the control capability of the operation of the fan is improved.
The control method of the intelligent range hood and other structures of the system thereof are described in the embodiment, and refer to the prior art.
The present invention is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present invention are within the scope of the technical proposal of the present invention.
Claims (7)
1. The control method of the intelligent range hood is characterized by comprising the following steps of:
s1, respectively carrying out data acquisition on external fuel gas and oil smoke by the intelligent range hood according to preset sampling parameters to generate a fuel gas sampling sequence and an oil smoke sampling sequence, wherein the sampling parameters comprise sampling periods and sampling numbers;
s2, the intelligent range hood shifts and clears the gas sampling sequence and the oil smoke sampling sequence of one sampling period respectively to generate a gas-reducing sampling sequence and an oil smoke-reducing sampling sequence, generates a gas average value according to the gas-reducing sampling sequence, and generates an oil smoke average value according to the oil smoke-reducing sampling sequence; the step S2 of generating the average gas value and the average oil smoke value comprises the following specific steps:
s211, the intelligent range hood obtains a convergence center value A1 of a gas sampling sequence in a sampling period T according to the following mathematical model;
wherein: i+k is the number of samples (i and k are positive integers, i > k), and N (i+k) is the sample sequence value;
s212, the intelligent range hood obtains a deviation average mean square value D (N (i+k)) of each sampling element of the gas sampling sequence in the sampling period T according to the following mathematical model;
D(N(i+k))＝(N(i+k)-A) 2 ；
wherein: a is the average value of the sampling sequence;
s213, shift clearing: among all sampling elements of the gas sampling sequence in the sampling period T, finding out k sampling elements corresponding to a deviation average mean square difference value D (N (i+k)) which deviates from the convergence central value A1 to the maximum, wherein the k sampling elements are called deviation sampling elements, and the k deviation sampling elements are removed by shifting; reserving the remaining i sampling elements to form a new sequence to replace the original gas sampling sequence, so as to form a gas-reducing sampling sequence;
s214, the intelligent range hood obtains the average value of the gas-reducing sampling sequence in the S213 according to the following mathematical model, and generates a final gas average value A2 of the sampling period T;
wherein N (i) is a downsampled sequence value;
the intelligent range hood obtains the average value of the oil smoke in the sampling period T according to the same operation of the S211-S214;
s3, the intelligent range hood performs comparison analysis on the gas average value and the oil smoke average value of different periods in the S2 according to a preset gas comparison value and oil smoke comparison value; the intelligent range hood combines the comparison result of the average gas value and the average oil smoke value to generate a real-time control signal of the fan; meanwhile, generating a real-time alarm signal according to a comparison result of the average value of the fuel gas;
s4, controlling the operation of the fan by the intelligent range hood according to the control signal of the S3; and the intelligent range hood respectively controls the opening and closing of the gas electromagnetic valve and the alarm according to the alarm signal of the S3.
2. The control method of the intelligent range hood according to claim 1, wherein the specific steps of shifting and clearing the fuel gas sampling sequence and the oil smoke sampling sequence in the nT period are as follows:
s221, acquiring a fuel gas sampling sequence and an oil smoke sampling sequence of an nT period;
s222, removing deviated sampling elements from a fuel gas sampling sequence and an oil smoke sampling sequence in an nT period according to the operations of S211-S213; updating the gas sampling sequence from which the deviated sampling elements are removed into a gas reducing sampling sequence of an nT period; and updating the lampblack sampling sequence after the offset sampling elements are removed into a reduced lampblack sampling sequence in the nT period.
3. A system of an intelligent range hood, comprising:
a gas sensor (1) for detecting the concentration of gas in the outside air, generating a gas signal;
the non-dispersive infrared detector (2) is used for detecting the oil smoke concentration in the outside air and generating an oil smoke signal;
the single chip microcomputer (3) is respectively connected with the gas sensor (1) and the non-dispersive infrared detector (2) and used for receiving a gas signal and an oil smoke signal, the single chip microcomputer (3) generates a control signal according to the gas signal and the oil smoke signal, and the single chip microcomputer (3) generates an alarm signal according to the gas signal;
the fan controller (4) is connected with the singlechip, and the fan controller (4) receives a control signal of the singlechip, converts an analog/digital signal and outputs the analog/digital signal to the fan, so that the intelligent range hood can realize speed regulation control and start and stop of the fan;
the alarm (5) is connected with the singlechip, receives an alarm signal of the singlechip and sends out alarm sound according to the alarm signal;
the wireless communicator (6) is used for communication connection between the intelligent range hood and the user mobile terminal; the wireless communicator (6) is connected with the singlechip (3), and the wireless communicator (6) receives an alarm signal of the singlechip (3) and converts the alarm signal into alarm information to be sent to the mobile terminal of the user; meanwhile, receiving control information of the mobile terminal of the user and sending the control information to the singlechip (3);
the control method of the intelligent range hood comprises the following steps:
s1, respectively carrying out data acquisition on external fuel gas and oil smoke by the intelligent range hood according to preset sampling parameters to generate a fuel gas sampling sequence and an oil smoke sampling sequence, wherein the sampling parameters comprise sampling periods and sampling numbers;
s2, the intelligent range hood shifts and clears the gas sampling sequence and the oil smoke sampling sequence of one sampling period respectively to generate a gas-reducing sampling sequence and an oil smoke-reducing sampling sequence, generates a gas average value according to the gas-reducing sampling sequence, and generates an oil smoke average value according to the oil smoke-reducing sampling sequence; the step S2 of generating the average gas value and the average oil smoke value comprises the following specific steps:
s211, the intelligent range hood obtains a convergence center value A1 of a gas sampling sequence in a sampling period T according to the following mathematical model;
wherein: i+k is the number of samples (i and k are positive integers, i > k), and N (i+k) is the sample sequence value;
s212, the intelligent range hood obtains a deviation average mean square value D (N (i+k)) of each sampling element of the gas sampling sequence in the sampling period T according to the following mathematical model;
D(N(i+k))＝(N(i+k)-A) 2 ；
wherein: a is the average value of the sampling sequence;
s213, shift clearing: among all sampling elements of the gas sampling sequence in the sampling period T, finding out k sampling elements corresponding to a deviation average mean square difference value D (N (i+k)) which deviates from the convergence central value A1 to the maximum, wherein the k sampling elements are called deviation sampling elements, and the k deviation sampling elements are removed by shifting; reserving the remaining i sampling elements to form a new sequence to replace the original gas sampling sequence, so as to form a gas-reducing sampling sequence;
s214, the intelligent range hood obtains the average value of the gas-reducing sampling sequence in the S213 according to the following mathematical model, and generates a final gas average value A2 of the sampling period T;
wherein N (i) is a downsampled sequence value;
the intelligent range hood obtains the average value of the oil smoke in the sampling period T according to the same operation of the S211-S214;
s3, the intelligent range hood performs comparison analysis on the gas average value and the oil smoke average value of different periods in the S2 according to a preset gas comparison value and oil smoke comparison value; the intelligent range hood combines the comparison result of the average gas value and the average oil smoke value to generate a real-time control signal of the fan; meanwhile, generating a real-time alarm signal according to a comparison result of the average value of the fuel gas;
s4, controlling the operation of the fan by the intelligent range hood according to the control signal of the S3; and the intelligent range hood respectively controls the opening and closing of the gas electromagnetic valve and the alarm according to the alarm signal of the S3.
4. The system of claim 3, wherein the intelligent range hood further comprises:
the optical sensor (7) is connected with the singlechip (3), the optical sensor (7) senses the current external light brightness condition, generates a light signal and outputs the light signal to the singlechip (3), and the singlechip (3) generates a lamp control signal according to the light signal;
the lamp controller (8) is connected with the singlechip (3), and the lamp controller (8) receives a lamp control signal to realize that the intelligent range hood controls the opening and closing of the illuminating lamp and the brightness.
5. The system of intelligent range hood according to claim 4, further comprising a microwave human body sensor (9) connected to the single chip microcomputer, wherein the microwave human body sensor (9) is used for detecting a human body target.
6. The system of a intelligent range hood according to any one of claims 3 to 5, characterized in that the intelligent range hood is further provided with a gas solenoid valve, which is connected with the single chip microcomputer (3).
7. The system of claim 6, wherein the alarm (5) is an audible and visual alarm, and the alarm (5) sounds and lights a warning light to remind the user to perform emergency treatment in time when the intelligent range hood detects an unattended abnormal state or a dangerous cooking state.
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